When honey is put in the freezer it does help to extend the life of the honey and also keeps ants away from the honey too.
Freezing the honey will not destroy any nutrients and the honey when put in the freezer will be just as nutritious as it would have been even if you did not put it in the freezer.
I keep some honey in my freezer as well to extend the shelf life of the honey and keeps ants away from it and it actually does not freeze solid.
The honey stays liquid and easy to pour even when put in the freezer and for honey to freeze solid it would have to get well below 0 F which a home freezer cannot reach those temperatures.
Honey doesn't even freeze in the winter when it's outside and made by the bees.